I’m stepping into the Magento realm in version 1.9, lucky me. Turns out they’ve added a new option which allows customers to bypass an extra review step when they decide to pay via PayPal Express. This feature is a bit mysterious though as it doesn’t seem to work all the time, requiring customers to complete a final review step on your Magento site in some cases. Finally I got to the bottom of this and felt it fair to save everyone else the time I spent to understand.